Where I work they're going to switch from ordinary imap to
imap via ssl.
So I need to get kmail or thunderbird to talk to the imap server
with port 993. I did the setup but thunderbird 2.0.0.14-1 says upon
trying to use the connection:

imap.jhuapl.edu has sent an incorrect or unexpected message Error code: -12263

I then made sure to put in a firewall entry to allow tcp:993 through to make sure
that wasn't the problem, same thing.

I've got no idea what this means, I've googled this and found people asking
about this but no one showed a solution I could figure out.
The openssl this system is using is openssl-0.9.8g-9.fc9.i686
and the OS is Fedora 9 i686. Thanks for any ideas.